Bibliografi : hlm. 453-458
No Inv.: 117531,117645-117648/P/Perp/09/5c
Judul asli : "Telemarketing"
Bibliografi : hlm 219-229
Bibliografi : hlm. 211-233
No Inv.: 129175/S/Perp/11/1c
No Inv.: 140948/Psm/Perp/14/1c
No Inv.: 112623-112626/P/Perp/08/4c~118990-118992/P/Perp/09/3c
No Inv.: 5510-5521/Perp/86/12c~4311-4320/P/Perp/97/10c